Inform 7

Inform 7 is an interactive fiction authorship system. It’s not the only one out there (see the other resources on Writing IF for how to choose a system), but it’s the one I use; I’ve also been quite closely involved in its development.

“Inform for Fiction Authors”: a post about how elements of interactive fiction, and Inform in particular, correspond to elements of traditional fiction writing

Chart of rules: a visual presentation of the major rulebooks used by I7 during play.

There is not an official separate forum or mailing list for Inform 7, but many people discuss coding issues on the intfiction forum. A search of the group will turn up answers to some frequently-asked questions.